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        <h2>
          <span class="refentrytitle">noteondur</span>
        </h2>
        <p>noteondur — 
      Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.
          </p>
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      <div class="refsect1">
        <a id="idp127633584"></a>
        <h2>Description</h2>
        <p>
      Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.
    </p>
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      <div class="refsect1">
        <a id="idp127634848"></a>
        <h2>Syntax</h2>
        <pre class="synopsis"><span class="command"><strong>noteondur</strong></span> ichn, inum, ivel, idur</pre>
      </div>
      <div class="refsect1">
        <a id="idp127636832"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>ichn</em></span> -- MIDI channel number (1-16)
    </p>
        <p>
      <span class="emphasis"><em>inum</em></span> -- note number (0-127)
    </p>
        <p>
      <span class="emphasis"><em>ivel</em></span> -- velocity (0-127)
    </p>
        <p>
      <span class="emphasis"><em>idur</em></span> -- how long, in seconds, this note should last.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp127641040"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>noteondur</em></span> (i-rate note on with duration) sends a noteon and a noteoff MIDI message both with the same channel, number and velocity. Noteoff message is sent after <span class="emphasis"><em>idur</em></span> seconds are elapsed by the time <span class="emphasis"><em>noteondur</em></span> was active.
    </p>
        <p>
      <span class="emphasis"><em>noteondur</em></span> differs from <span class="emphasis"><em>noteondur2</em></span> in that <span class="emphasis"><em>noteondur</em></span> truncates note duration when current instrument is deactivated by score or by real-time playing, while <span class="emphasis"><em>noteondur2</em></span> will extend performance time of current instrument until <span class="emphasis"><em>idur</em></span> seconds have elapsed. In real-time playing, it is suggested to use <span class="emphasis"><em>noteondur</em></span> also for undefined durations, giving a large <span class="emphasis"><em>idur</em></span> value.
    </p>
        <p>
      Any number of <span class="emphasis"><em>noteondur</em></span> opcodes can appear in the same Csound instrument, allowing chords to be played by a single instrument.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp127648352"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the noteondur opcode. It uses the file <a class="ulink" href="examples/noteondur.csd" target="_top"><em class="citetitle">noteondur.csd</em></a>.

      </p>
        <div class="example">
          <a id="idp127650208"></a>
          <p class="title">
            <strong>Example 543. Example of the noteondur opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <p>This example generates notes for every note received on the MIDI input. It generates MIDI notes on csound's MIDI output, so be sure to connect something.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out   Audio in    No messages</span>
-odac           -iadc     -d         -M0  -Q1<span class="comment">;;;RT audio I/O with MIDI in</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 2

<span class="comment">; Example by Giorgio Zucco 2007</span>

<span class="oblock">instr</span> 1  <span class="comment">;Turned on by MIDI notes on channel 1</span>

  ifund   <span class="opc">notnum</span>
  ivel 	<span class="opc">veloc</span>
  idur <span class="op">=</span> 1

  <span class="comment">;chord with single key</span>
  <span class="opc">noteondur</span> 	1, ifund,   ivel, idur
  <span class="opc">noteondur</span> 	1, ifund<span class="op">+</span>3, ivel, idur
  <span class="opc">noteondur</span> 	1, ifund<span class="op">+</span>7, ivel, idur
  <span class="opc">noteondur</span> 	1, ifund<span class="op">+</span>9, ivel, idur

<span class="oblock">endin</span>

<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="comment">; Play Instrument #1 for 60 seconds.</span>

<span class="stamnt">i</span>1 0 60

<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp127655056"></a>
        <h2>See Also</h2>
        <p>
      <a class="link" href="noteoff.html" title="noteoff"><em class="citetitle">noteoff</em></a>,
      <a class="link" href="noteon.html" title="noteon"><em class="citetitle">noteon</em></a>,
      <a class="link" href="noteondur2.html" title="noteondur2"><em class="citetitle">noteondur2</em></a>,
      <a class="link" href="midion.html" title="midion"><em class="citetitle">midion</em></a>,
      <a class="link" href="midion2.html" title="midion2"><em class="citetitle">midion2</em></a>
    </p>
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      <div class="refsect1">
        <a id="idp127660944"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: Gabriel Maldonado</td>
          </tr>
          <tr>
            <td>Italy</td>
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        <p>
    </p>
        <p>New in Csound version 3.47</p>
        <p>Thanks goes to Rasmus Ekman for pointing out the correct MIDI channel and controller number ranges.</p>
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